java.time.OffsetDateTime.with(TemporalField field, long newValue)

package com.codingdict;

import java.time.OffsetDateTime;
import java.time.temporal.ChronoField;

public class OffsetDateTimeDemo {
   public static void main(String[] args) {

      OffsetDateTime date = OffsetDateTime.parse("2017-01-03T10:15:30+01:00");
      OffsetDateTime result = date.with(ChronoField.DAY_OF_MONTH,13);
      System.out.println(result);  
   }
}